Gas burning apparatus



Sept. 19, 1933. N, 'r. BRANCHE GAS BURNING APPARATUS Original Filed June28, 1929 GOO 000 1M7T5/P/1/VCHE BY fiuL/Z ATTORNEY INVENI'OIR PatentedSept. 19, 1933 GAS BURNING APPARATUS Nelson T. Branche, Toledo, Ohio,assignor to Surface Combustion Corporation, Toledo, Ohio, a corporationof New York Application June 28, 1929, Serial No. 374,340

Renewed May 24, 1933 6 Claims.

This invention relates to improvements in gas burning apparatus forconverting domestic house heating furnaces, originally designed forburning solid fuel, into gas burning furnaces, the invention being moreparticularly concerned with the burner parts which are installed withinthe furnace firebox and ash pit chamber.

Referring to the drawing wherein the preferred form of the invention isshown:

Fig. 1 shows the burner end of the apparatus in vertical section (online 11 of Fig. 2) and as applied to a furnace having a circularfirebox, that portion of the apparatus outsideof the furnace serving togive an understanding of the apparatus as a whole, and being of wellknown construction; Fig. 2 is a plan view of the apparatus shown in Fig.1; Fig. 3 shows how the burner end of the apparatus is modified forapplication to furnaces with rectangular fireboxes; Fig. 4 is a sectionon line 44 of Fig. 3, and Fig. 5 shows the contour relationship betweenburner heads for circular and rectangular fireboxes.

It is quite immaterial to the present invention whether the furnace becircular or rectangular as regards its firebox for the reason that whilethe contour of certain parts will depend upon the contour of thefirebox, nevertheless the combinational arrangement of the parts remainsthe same for both circular and rectangular fireboxes. The details ofconstruction of that portion of the apparatus which is outside of thefurnace are of no particular concern to the present invention and may besubstantially the same as that disclosed in patent to Klees 1,852,119.

10 indicates the ash pit and 12 the firebox of an ordinary house heatingfurnace. To adapt such a furnace to the present invention, the usualgrates areremoved as is also the ash pit door. In place of the door,there is associated with the door opening 18 an air box or casing towhich the admission of air is controlled by a damper 36. Housed andsupported by the casing are two identical mixing tubes 15 and 17. At thefront end of the casing is a head 28 having two identical open-endedtunnels 20, one for each mixing tube, the receiving end of the latterbeing supported by its tunnel. At the front end of each tunnel is a diskshutter 22 for controlling the admission of air to mixing tubes. Gas issupplied to the tubes by a pair of gas nozzles 24, one for each tube. 26indicates a gas supply pipe; 32 a gas valve, and 34 a motor. forsimultaneously opening and closing the said valve and damper, the latterbeing operatively connected to the motor by means including a lever 37.The construction thus far described is substantially the same as thatdisclosed in Klees 1,852,119.

Each mixing tube has an angled extension, 14 and 16. These extensions 14and 16 are conduits of equal length and together constitute uprightsupports for the burner assembly. Thus secured to and projectingforwardly from the discharge end of the'air box 30 is a bracket 38having an upturned extension 40, this bracket forming a support for theouter ends of the tut-es 15 and 17 each of which is provided with a foot42 adapted to rest on and be secured to said bracket. Securing means,such as screws, 44 passed through the upturned extension 40 and intolugs 45 at the top of the feet 42 serve to more firmly hold theextensions 14 and 16 in upright fixed position.

In accordance with the present invention, the burner assembly comprisesa two head burner generally indicated at 46 and a baflie-supporting basegenerally indicated at 54. In the case of a circular firebox, there willbe two semi-circular heads to form a circular burner as shown in Fig.

2 whereas in the case of a rectangular firebox, the heads may be of theform indicated in Fig. 3 to provide a burner which is rectangular inplan. The baffle-supporting base 54 will be rectangular or circular inplan accordingly as the burner is rectangular or circular. Each of theburner heads 48 and 50 is hollow; is closed at its opposite ends; isprovided with a multiplicity of discharge tips and is apertured anddetachably supported midway its ends on one or the other of the uprightextensions or conduits 14 or 16. By supporting the heads midway theirends, it will be readily apparent that they are interchangeable. Thisinterchangeability of heads is an important feature of the inventonsince it makes unnecessary the keeping on hand of a supply of specialright and left heads, and what is equally important, it automaticallyeliminates all possibility of confusion in supplying a customer with tworights or two lefts instead of one of each where the heads are ofspecial right and left construction,

it being understood that the burner end of the 1 apparatus is suppliedto the customer in knocked down condition.

The bathe-supporting base 54 is detachably supported by the burner headswithin the confines of the space encompassed thereby, as on the inwardlyprojecting lugs 58, and supported on and extending upwardly from thesaid base are the baffle elements 52 which form with the firebox wallsan upwardly converging space 51 whereinto the burner fires.

In the preferred form of the invention there is provided on each burnerhead a number of lateral lugs 58 on which the lower peripheral edge ofthe base 54 rests, said lugs being provided with upstanding terminalprojections for so centering the base on the burner as to providebetween the rim of the base and the inner side of the burner aperipheral passage 56 through which air from below the base 54 may fiowupwardly and thus supply secondary air to the burner. As clearly shownin Figs. 1 and 4, that part of the base or cover .54 which rests on thelugs 58 comprises an upwardly and outwardly extending rim or flangewhich extends sufficiently above the lower edge of the bafiie seat 5''!to prevent the bafiles from sliding ofi the seat.

Secondary air is also supplied to the burner through a passage 60 formedbetween the outer side of the burner and a surrounding casing 62 whichis spaced from the burner by a series of outwardly extending lugs 61formed on the burner heads. The casing is shown as a sheet metal memberwhose ends are held together by suitable securing means 64, the air box30 delivering into said casing.

In Fig. 5, the form relationship of the two types of bumer'heads isshown,'it being seen that the ends of the heads terminate equi-distantfrom the axes of their respective pipe supports, thus making it possibleto use the unit construction comprising the mixture supply pipes and airbox 30 for difierent types of furnace firebox by merely supplying theproper form of burner and baflle base and of course the proper form ofburnersurrounding casing 62. It will be readily appreciated that byutilizing a pair of independent but identical burner heads in theconstruction of the burner and by independently supporting such headsand by supporting the baffle-supporting base in the burner heads, therewill be a minimum of trouble in applying the apparatus to afurnace'.

What is claimed is:

1. In gas burning apparatus, the combination of a pair of similarmixture supply conduits both extending upwardly in laterally spacedrelation, a'pair of like elongated hollow burner heads connected midwaybetween their ends to the upper ends of said conduits and constituting agas .burner defining an enclosure, a detachable cover having adownwardly extending flange and forming a seat to receive the lower endsof upwardly and outwardly extending baflie elements, and

means formed integral with the burner heads and coacting with saidflange to fix the position of said cover in spaced relation to theburner to permit a flow of secondary air thereto.

2. The combination with a ring type gas bumer, of a detachable coverhaving a downwardly extending fiange and a seat to receive the lowerends of a plurality of upwardly and outwardly extending bailie elements,and means .formed integral with the burner and coacting with said flangeto fix the position of said cover in spaced relation to-the burner topermit a flow of secondary air thereto. I

8. In a gas burning apparatus, the combination of a pair ofmixture-supply conduits extend ing upwardly side by side in laterallyspaced relation, means for supporting and maintaining the conduits insaid relation, elongate burner segments'of substantially the same formand length, the segments being disengageably mounted andsupported'midway their ends on the discharge ends of the respectiveconduits and encompassing an otherwise free and open space therebetweenand being disconnected from each other, and a body disengageablysupported by the segments and covering the space encircled therebyexcept along the marginal edges thereof.

' 4. In a gas burning apparatus, the combination of a pair ofmixture-supply conduits extending upwardly side by sidein laterallyspaced relation, means for supporting and maintaining the conduits insaid relation, elongate burner segments of substantially the same formand length, the segments being disengageably mounted and supportedmidway their ends on the discharge ends of the respective conduitsand-extending side by side in spaced parallel relation, and a bodydisengageably supported by the burner segments and covering the spacetherebetween except along the marginal edges thereof.

5. In the combination specified in claim 4, the said segments havinglateral extensions at their ends, the extensions at adjacent ends beingarranged in opposition, and the said body terminating short of saidends.

6. In the combination specified in claim 3, the

conduits comprising angled extensions of horizontally disposed mixingtubes and the said means for supporting and maintaining the conduits inthe manner stated comprising a bracket which extends crosswise of theconduits and tubes.

NELSON 'r. BRANCHEi

